I recently inherited one of these boxes and I decided to test it with a spare 500GB. The problem is that it seems the mininum number of drives required to make it usable is 2. The default configuration sets up RAID for the OS partition on /dev/md0, but /dev/md1 is never configured because it expects a secondary drive (from what I can tell). I also can't put it into JBOD mode via the Web UI because it complains that the "The selected function is not available due to the state of the disks."

Is there any other way to get it working with only one drive, or do I have to get a secondary. I don't mind running it in JBOD mode.